Drill-machine.



J. A. EDEN, JR.

DRILL MACHINE.

APPLICATION man JUNE 15. 1 914.

Patented Nov. 26, 1918.

UNITED STATES PATE OFFICE.

JAMES A. EDEN, JR., 015 SPRINGFIELD, MASSACHUSETTS, AS-SIGNOR T0 MACHINETOOL COMPANY, A CORPORATION OF MASSACHUSETTS.

DRILL-MACHINE.

Specification of Letters Patent.

Patented Nov. 26, 1918.

Application filed .l'une 15, 1914. Serial No. 845,323.

The accompanying drawings illustrate an.

embodiment of the invention as multiple drill machine. I

Figure 1 is a perspective of the head of such a machine of a commontype;

Fig. 2 is a section through the same illustrating the application of theinvention thereto; I 7

Figs. 3 and 4 are vertical elevations of the head section of thespindles with surrounding parts in cross section;

Fig. 5 is a horizontal section on the line 55 of Fig. 4.

In multiple drills it is common to provide a head A with a side flangeB, the lower edge of which is also flanged and carries bolts C whichpass through an arm D and permit adjustment of the latter lengthwise andpivotally; and to provide a number of spindles all mounted at theirupper ends in the head A and each mounted at its lower end in the innerend of one of the adjustable arms D. In Fig. 2 I have illustrated thisconstruction for one of the spindles. The flexible spindle comprises ahead section E journaled in a fixed bearing in the head, an arm sectionF journaled in a bearing in the arm D and an intermediate extensible andflexible section comprising parts G and H telescoping into each other,the former connected by a universal joint with the head section and thelatter connected by a similar joint with the arm section. The headsection E of the spindle is driven from a pinion J through a centralgear K. The tail section has at its lower end a socket to receive thedrill.

Sometimes it is desired to use such machines with less than the wholenumber of spindles. The arms D and the lower portions H and F of thespindles which are not being used can be easily removed by unscrewingthe nuts from the bolts C, but this leaves the head section and the partG of the applied to a flexible portion of the spindle in the ma chine.These parts have heretofore been connected by a permanent attachmentsuch, for example, asa driven pin and the removal thereof has been slowandlaboriousj My invention provides a detachable connection of theflexible portion of the spindle to the head section, which permits theseparation of these parts very quickly and without difiiculty. I

The hub L of the universal joint constitutes one of the end pieces ofthe flexible portions of the shaft. This and the end M of the headsection E are tongued so that they may beengaged with and disengagedfrom each other by a lateral motion. The

tongues N and O are complementary parts of a cylinder fitting with flatinternal faces against each other so as to transmit the rotation of theone to the other. Preferably also they are formed with overhanging endsor hooks P and Q, as shown in Figs. 3 and 4: so as to hold up the partsL and G. A locking ring R is provided having a free fit on the tonguedend pieces L and M and adapted to surround such end pieces as in Fig. 3to lock them together. A spring ring S fits in a groove T surroundingthe end piece L and projects slightly therefrom so as to be engaged bythe lower end of the locking ring when the latter is in its lockingposition and thus to hold the latter in such position. The locking ringR is provided on the inner portion of its edge with a groove U whichfits over the spring ring in the locking position of Fig. 2 and thusholds the latter against accidental displacement.

When the flexible spindle is to be disconnected the locking ring R islifted slightly to give access to the spring ring. The latter is thenexpanded slightly and lowered and the locking ring is shifted down tothe position of Fig. 4, where it is below the tongued portions of theend pieces L and M. In this position the parts may be disconnected by asimple lateral movement of the upper end of the flexible portion of theshaft. The parts may be reassembled with the same ease by placing theend pieces L and M in proper engagement, raising the locking ring R toits highest position, introducing the spring S into its groove T anddropping the looking ring thereon.

The invention is applicable not only to the vertical drill machineillustrated but to machines working with the drills at various otherangles and is applicable not only to multiple drill machines, but tovarious other machines Where it is desired to provide a ready detachmentof a spindle or any part thereof. In fact, though I have described withgreat particularity of detail a specific embodiment of my invention yetit is not to be understood that the invention is restricted to theparticular embodiment described. Various modifications thereof in detailand in the arrangement of the parts may be made by those skilled in theart Without departure from the invention as expressed in the followingclaims.

lVhat I claim is 1. A drill machine including a flexible spindle havinga head section mounted in a fixed bearing and having a flexible portion,said head section and said flexible portion having tongued ends adaptedto be engaged with and disengaged from each other by a lateral motion,and a locking ring adapted to surround said tongued ends when so engagedto lock them together, and to be shifted to a point beyond said tonguedends to release them and permit their separation, and a spring ringfitting in a groove near one of said tongued ends to hold said lookmgring in its locking position and adapted to be removed to permit theshifting of the locking ring to its releasing position.

2. A drill machine including a flexible spindle having a head sectionmounted in a fixed bearing and having a flexible portion, said headsection and said flexible portion having tongued ends adapted to beengaged with and disengaged from each other by a lateral motion alocking ring adapted to surround said tongued ends when so engaged tolock them together, and to be shifted to a point beyond said tonguedends to release them and permit their separation, and a spring ringfitting in a groove near one of said tongued ends to hold said lockingring in its locking position and adapted to be re moved to permit theshifting of the locking ring to its releasing position, said lockingring in its locking position being adapted to embrace the spring ring s0as to hold the latter in place.

In Witness whereof, I have hereunto signed. my name in the presence oftwo subscribing Witnesses.

JAMES A. EDEN, J11. Witnesses:

ROGER D. BABSON, DAVID MoCoMBE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G,

